Abstract:

The Radar Cross Section (RCS) of a straight rectangle to round scoop inlet has been investigated. It includes the influences of the attack angle and termination on the electromagnetic scattering characteristics. Then the measurements of the Radar Cross Section Reduction (RCSR) of the inlet are put forward. At the same time, the effects of length, position of absorbing wave material and absorbing wave grille on RCSR are further studied. As the results indicate, the measurements suggested here have put very distinct effect on decreasing RCS of the inlet. This paper affords a technological basis for efficiently improving the low observable inlets.

Key words: air inlet s, electr om agnetic scatter ing, RCS, RCSR